Switch Between Two Mini Jack SourcesBi-Directional: 1 In/2 Out or 2 In/1 OutConnect Two iPods to Your House SystemSwitch Line Inputs to Amp, Mixer or PCSwitch Outputs Between Amp, Mixer or PCSwitch Between Headphones & SpeakersSwitch Between Two Sets of MonitorsMake Rear Mounted Mini Jacks AccessibleGreat for Recording Multiple SourcesSaves Wear & Tear On Equipment